MessageBox causing NT CTD

[snaphook]

if(!feWarn && finalExitMode == "TRO" && (TDirection == "L" ? (TRO(tROPeriods)[0] < TRO(tROPeriods)[1] && TRO(tROPeriods)[1] > TRO(tROPeriods)[2]) : (TRO(tROPeriods)[0] > TRO(tROPeriods)[1] && TRO(tROPeriods)[1] < TRO(tROPeriods)[2])))
{
MessageBox.Show("A TRO HOOK may be imminent.",
"TRO Hook",
MessageBoxButtons.OK,
MessageBoxIcon.Information);
feWarn = true;
}
else if(!feWarn && finalExitMode == "CCI" && (TDirection == "L" ? (CCI(cCIPeriods)[0] < lineValue && CCI(cCIPeriods)[1] > lineValue) : (CCI(cCIPeriods)[0] > -lineValue && CCI(cCIPeriods)[1] < -lineValue)))
{
MessageBox.Show("A CCI LINE CROSS may be imminent.",
"CCI Line Cross",
MessageBoxButtons.OK,
MessageBoxIcon.Information);
feWarn = true;
}

I have the above code in an indicator to alert when a tracked trade is becoming precarious. feWarn is set to false in [Variables] and reset to false in EndTrade() (not shown) which is called when a trade goes flat.

using System.Windows.Forms;
is set in [declarations].

For whatever reason, the message box appears multiple times (still scratching head on that one), and NT crashes to the desktop w/o warning. The Trace file shows nothing and the the log tab, of course, is reset.

[NinjaTrader_RyanM1]

Hi Snaphook,

Unfortunately using message boxes and System.Windows.Forms is not supported. You can use them, but will have to track down on your own the cause of any error messages, crashes, or issues. Hopefully another community member with experience using message boxes can assist here.

[snaphook]

I hope someone can tell me what is wrong with the code, but the other reason for posting this was to alert you to the fact that it is causing a full blown, fatal, and immediate crash to the desktop of NT, w/o the "NT has detected a problem..." dialog, not a good thing.

[NinjaTrader_Bertrand]

Thanks snaphook, however we could unfortunately not debug this code as using it falls out of our supported boundaries as Ryan mentioned.